Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection – Frangible connection
Patent
1988-10-17
1989-12-19
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
Frangible connection
411 10, 411 14, F16B 3100, F16B 3112
Patent
active
048879487
ABSTRACT:
Deformable washer, particularly for predetermining the force needed for tightening a nut mounted on a screw or a screw cooperating with a tapped hole. The washer is provided on one of its faces, preferably the face which is meant to rest against one of the parts to be tightened, with a circular spot face, concentric to the central hole, the external diameter of which spot face is notably greater than the diameter of the central hole, while its depth is preferably near to the width of the spot faced ring. The washer further comprises, on its edge, a visible groove of which the cylindrical base is also concentric to the central hole and has a diameter at the most equal to the external diameter of the circular spot face and preferably just under said external diameter, the thickness of said groove being also as near as possible to the depth of the spot face.
REFERENCES:
patent: 3306154 (1967-02-01), Bailey
patent: 3602976 (1971-09-01), Grube
patent: 3728933 (1973-04-01), Grube
patent: 3948141 (1976-04-01), Shinjo
Soviet Inventions Illustrated, Sectio Mechanique, B35, Oct. 10, 1979, H4727B Q61, SU-634,023, Pospeev, V. Nov. 28, 1978.
Eslinger Lewis H.
Establissements Caillau
Maioli Jay H.
Wilson Neill R.
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